Feature request - specify different app.json

With Sencha Touch, sometimes I want to include different JS files in my development and production builds. For example, I might want to include sencha-touch-all.js when testing in a browser, and phonegap.js when building an app.

I can't do this right now, since "sencha app build" always uses the same app.json. Can you add an argument that lets us specify the app.json file to use?